methyl 4-O-acetyl-3-O-benzyl-β-L-idopyranuronate-1,2-(methyl orthoacetate)

methyl 3-O-benzyl-4-O-tert-butyldimethylsilyl-β-L-idopyranuronate 1,2-(methyl-orthoacetate)

methyl 2-O-acetyl-3-O-benzyl-4-O-tert-butyldimethylsilyl-α-L-idopyranosyluronate-(1→4)-tert-butyldimethylsilyl (2-azido-3-O-benzyl-6-O-levulinoyl-2-deoxy-β-D-glucopyranoside)